    @import url("https://fonts.googleapis.com/css?family=Roboto+Mono|Source+Sans+Pro:300,400,600");
    * {
        -webkit-font-smoothing: antialiased;
        -webkit-overflow-scrolling: touch;
        -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
        -webkit-text-size-adjust: none;
        -webkit-touch-callout: none;
        box-sizing: border-box;
    }
    
    body:not(.ready) {
        overflow: hidden;
    }
    
    body:not(.ready) [data-cloak],
    body:not(.ready) .app-nav,
    body:not(.ready)>nav {
        display: none;
    }
    
    div#app {
        font-size: 30px;
        font-weight: lighter;
        margin: 40vh auto;
        text-align: center;
    }
    
    div#app:empty::before {
        content: 'Loading...';
    }
    
    .emoji {
        height: 1.2rem;
        vertical-align: middle;
    }
    
    .progress {
        background-color: var(--theme-color, #42b983);
        height: 2px;
        left: 0px;
        position: fixed;
        right: 0px;
        top: 0px;
        transition: width 0.2s, opacity 0.4s;
        width: 0%;
        z-index: 999999;
    }
    
    .search a:hover {
        color: var(--theme-color, #42b983);
    }
    
    .search .search-keyword {
        color: var(--theme-color, #42b983);
        font-style: normal;
        font-weight: bold;
    }
    
    html,
    body {
        height: 100%;
    }
    
    body {
        -moz-osx-font-smoothing: grayscale;
        -webkit-font-smoothing: antialiased;
        color: #34495e;
        font-family: 'Source Sans Pro', 'Helvetica Neue', Arial, sans-serif;
        font-size: 15px;
        letter-spacing: 0;
        margin: 0;
        overflow-x: hidden;
    }
    
    img {
        /*max-width: 80%;*/
        max-height: 400px;
    }
    
    a[disabled] {
        cursor: not-allowed;
        opacity: 0.6;
    }
    
    kbd {
        border: solid 1px #ccc;
        border-radius: 3px;
        display: inline-block;
        font-size: 12px !important;
        line-height: 12px;
        margin-bottom: 3px;
        padding: 3px 5px;
        vertical-align: middle;
    }
    
    li input[type='checkbox'] {
        margin: 0 0.2em 0.25em 0;
        vertical-align: middle;
    }
    
    .app-nav {
        margin: 25px 60px 0 0;
        position: absolute;
        right: 0;
        text-align: right;
        z-index: 10;
        /* navbar dropdown */
    }
    
    .app-nav.no-badge {
        margin-right: 25px;
    }
    
    .app-nav p {
        margin: 0;
    }
    
    .app-nav>a {
        margin: 0 1rem;
        padding: 5px 0;
    }
    
    .app-nav ul,
    .app-nav li {
        display: inline-block;
        list-style: none;
        margin: 0;
    }
    
    .app-nav a {
        color: inherit;
        font-size: 16px;
        text-decoration: none;
        transition: color 0.3s;
    }
    
    .app-nav a:hover {
        color: var(--theme-color, #42b983);
    }
    
    .app-nav a.active {
        border-bottom: 2px solid var(--theme-color, #42b983);
        color: var(--theme-color, #42b983);
    }
    
    .app-nav li {
        display: inline-block;
        margin: 0 1rem;
        padding: 5px 0;
        position: relative;
        cursor: pointer;
    }
    
    .app-nav li ul {
        background-color: #fff;
        border: 1px solid #ddd;
        border-bottom-color: #ccc;
        border-radius: 4px;
        box-sizing: border-box;
        display: none;
        max-height: calc(100vh - 61px);
        overflow-y: auto;
        padding: 10px 0;
        position: absolute;
        right: -15px;
        text-align: left;
        top: 100%;
        white-space: nowrap;
    }
    
    .app-nav li ul li {
        display: block;
        font-size: 14px;
        line-height: 1rem;
        margin: 0;
        margin: 8px 14px;
        white-space: nowrap;
    }
    
    .app-nav li ul a {
        display: block;
        font-size: inherit;
        margin: 0;
        padding: 0;
    }
    
    .app-nav li ul a.active {
        border-bottom: 0;
    }
    
    .app-nav li:hover ul {
        display: block;
    }
    
    .github-corner {
        border-bottom: 0;
        position: fixed;
        right: 0;
        text-decoration: none;
        top: 0;
        z-index: 1;
    }
    
    .github-corner:hover .octo-arm {
        -webkit-animation: octocat-wave 560ms ease-in-out;
        animation: octocat-wave 560ms ease-in-out;
    }
    
    .github-corner svg {
        color: #fff;
        fill: var(--theme-color, #42b983);
        height: 80px;
        width: 80px;
    }
    
    main {
        display: block;
        position: relative;
        width: 100vw;
        height: 100%;
        z-index: 0;
    }
    
    main.hidden {
        display: none;
    }
    
    .anchor {
        display: inline-block;
        text-decoration: none;
        transition: all 0.3s;
    }
    
    .anchor span {
        color: #34495e;
    }
    
    .anchor:hover {
        text-decoration: underline;
    }
    
    .sidebar {
        border-right: 1px solid rgba(0, 0, 0, 0.07);
        overflow-y: auto;
        padding: 40px 0 0;
        position: absolute;
        top: 0;
        bottom: 0;
        left: 0;
        transition: transform 250ms ease-out;
        width: 300px;
        z-index: 20;
    }
    
    .sidebar>h1 {
        margin: 0 auto 1rem;
        font-size: 1.5rem;
        font-weight: 300;
        text-align: center;
    }
    
    .sidebar>h1 a {
        color: inherit;
        text-decoration: none;
    }
    
    .sidebar>h1 .app-nav {
        display: block;
        position: static;
    }
    
    .sidebar .sidebar-nav {
        line-height: 2em;
        padding-bottom: 40px;
    }
    
    .sidebar li.collapse .app-sub-sidebar {
        display: none;
    }
    
    .sidebar ul {
        margin: 0 0 0 15px;
        padding: 0;
    }
    
    .sidebar li>p {
        font-weight: 700;
        margin: 0;
    }
    
    .sidebar ul,
    .sidebar ul li {
        list-style: none;
    }
    
    .sidebar ul li a {
        border-bottom: none;
        display: block;
    }
    
    .sidebar ul li ul {
        padding-left: 20px;
    }
    
    .sidebar::-webkit-scrollbar {
        width: 4px;
    }
    
    .sidebar::-webkit-scrollbar-thumb {
        background: transparent;
        border-radius: 4px;
    }
    
    .sidebar:hover::-webkit-scrollbar-thumb {
        background: rgba(136, 136, 136, 0.4);
    }
    
    .sidebar:hover::-webkit-scrollbar-track {
        background: rgba(136, 136, 136, 0.1);
    }
    
    .sidebar-toggle {
        background-color: transparent;
        background-color: rgba(255, 255, 255, 0.8);
        border: 0;
        outline: none;
        padding: 10px;
        position: absolute;
        bottom: 0;
        left: 0;
        text-align: center;
        transition: opacity 0.3s;
        width: 284px;
        z-index: 30;
        cursor: pointer;
    }
    
    .sidebar-toggle:hover .sidebar-toggle-button {
        opacity: 0.4;
    }
    
    .sidebar-toggle span {
        background-color: var(--theme-color, #42b983);
        display: block;
        margin-bottom: 4px;
        width: 16px;
        height: 2px;
    }
    
    body.sticky .sidebar,
    body.sticky .sidebar-toggle {
        position: fixed;
    }
    
    .content {
        padding-top: 60px;
        position: absolute;
        top: 0;
        right: 0;
        bottom: 0;
        left: 300px;
        transition: left 250ms ease;
    }
    
    .markdown-section {
        margin: 0 auto;
        max-width: 80%;
        padding: 30px 15px 40px 15px;
        position: relative;
    }
    
    .markdown-section>* {
        box-sizing: border-box;
        font-size: inherit;
    }
    
    .markdown-section> :first-child {
        margin-top: 0 !important;
    }
    
    .markdown-section hr {
        border: none;
        border-bottom: 1px solid #eee;
        margin: 2em 0;
    }
    
    .markdown-section iframe {
        border: 1px solid #eee;
        /* fix horizontal overflow on iOS Safari */
        width: 1px;
        min-width: 100%;
    }
    
    .markdown-section table {
        border-collapse: collapse;
        border-spacing: 0;
        display: block;
        margin-bottom: 1rem;
        overflow: auto;
        width: 100%;
    }
    
    .markdown-section th {
        border: 1px solid #ddd;
        font-weight: bold;
        padding: 6px 13px;
    }
    
    .markdown-section td {
        border: 1px solid #ddd;
        padding: 6px 13px;
    }
    
    .markdown-section tr {
        border-top: 1px solid #ccc;
    }
    
    .markdown-section tr:nth-child(2n) {
        background-color: #f8f8f8;
    }
    
    .markdown-section p.tip {
        background-color: #f8f8f8;
        border-bottom-right-radius: 2px;
        border-left: 4px solid #f66;
        border-top-right-radius: 2px;
        margin: 2em 0;
        padding: 12px 24px 12px 30px;
        position: relative;
    }
    
    .markdown-section p.tip:before {
        background-color: #f66;
        border-radius: 100%;
        color: #fff;
        content: '!';
        font-family: 'Dosis', 'Source Sans Pro', 'Helvetica Neue', Arial, sans-serif;
        font-size: 14px;
        font-weight: bold;
        left: -12px;
        line-height: 20px;
        position: absolute;
        height: 20px;
        width: 20px;
        text-align: center;
        top: 14px;
    }
    
    .markdown-section p.tip code {
        background-color: #efefef;
    }
    
    .markdown-section p.tip em {
        color: #34495e;
    }
    
    .markdown-section p.warn {
        background: rgba(66, 185, 131, 0.1);
        border-radius: 2px;
        padding: 1rem;
    }
    
    .markdown-section ul.task-list>li {
        list-style-type: none;
    }
    
    body.close .sidebar {
        transform: translateX(-300px);
    }
    
    body.close .sidebar-toggle {
        width: auto;
    }
    
    body.close .content {
        left: 0;
    }
    
    @media print {
        .github-corner,
        .sidebar-toggle,
        .sidebar,
        .app-nav {
            display: none;
        }
    }
    
    @media screen and (max-width: 768px) {
        .github-corner,
        .sidebar-toggle,
        .sidebar {
            position: fixed;
        }
        .app-nav {
            margin-top: 16px;
        }
        .app-nav li ul {
            top: 30px;
        }
        main {
            height: auto;
            min-height: 100vh;
            overflow-x: hidden;
        }
        .sidebar {
            left: -300px;
            transition: transform 250ms ease-out;
        }
        .content {
            left: 0;
            max-width: 100vw;
            position: static;
            padding-top: 20px;
            transition: transform 250ms ease;
        }
        .app-nav,
        .github-corner {
            transition: transform 250ms ease-out;
        }
        .sidebar-toggle {
            background-color: transparent;
            width: auto;
            padding: 30px 30px 10px 10px;
        }
        body.close .sidebar {
            transform: translateX(300px);
        }
        body.close .sidebar-toggle {
            background-color: rgba(255, 255, 255, 0.8);
            transition: 1s background-color;
            width: 284px;
            padding: 10px;
        }
        body.close .content {
            transform: translateX(300px);
        }
        body.close .app-nav,
        body.close .github-corner {
            display: none;
        }
        .github-corner:hover .octo-arm {
            -webkit-animation: none;
            animation: none;
        }
        .github-corner .octo-arm {
            -webkit-animation: octocat-wave 560ms ease-in-out;
            animation: octocat-wave 560ms ease-in-out;
        }
    }
    
    @-webkit-keyframes octocat-wave {
        0%,
        100% {
            transform: rotate(0);
        }
        20%,
        60% {
            transform: rotate(-25deg);
        }
        40%,
        80% {
            transform: rotate(10deg);
        }
    }
    
    @keyframes octocat-wave {
        0%,
        100% {
            transform: rotate(0);
        }
        20%,
        60% {
            transform: rotate(-25deg);
        }
        40%,
        80% {
            transform: rotate(10deg);
        }
    }
    
    section.cover {
        align-items: center;
        background-position: center center;
        background-repeat: no-repeat;
        background-size: cover;
        height: 100vh;
        width: 100vw;
        display: none;
    }
    
    section.cover.show {
        display: flex;
    }
    
    section.cover.has-mask .mask {
        background-color: #fff;
        opacity: 0.8;
        position: absolute;
        top: 0;
        height: 100%;
        width: 100%;
    }
    
    section.cover .cover-main {
        flex: 1;
        margin: -20px 16px 0;
        text-align: center;
        position: relative;
        margin-bottom: 200px;
    }
    
    section.cover a {
        color: inherit;
        text-decoration: none;
    }
    
    section.cover a:hover {
        text-decoration: none;
    }
    
    section.cover p {
        line-height: 1.5rem;
        margin: 1em 0;
    }
    
    section.cover h1 {
        color: inherit;
        font-size: 2.5rem;
        font-weight: 300;
        margin: 0.625rem 0 2.5rem;
        position: relative;
        text-align: center;
    }
    
    section.cover h1 a {
        display: block;
    }
    
    section.cover h1 small {
        bottom: -0.4375rem;
        font-size: 1rem;
        position: absolute;
    }
    
    section.cover blockquote {
        font-size: 1.5rem;
        text-align: center;
    }
    
    section.cover ul {
        line-height: 1.8;
        list-style-type: none;
        margin: 1em auto;
        max-width: 500px;
        padding: 0;
    }
    
    section.cover .cover-main>p:last-child a {
        border-color: var(--theme-color, #42b983);
        border-radius: 2rem;
        border-style: solid;
        border-width: 1px;
        box-sizing: border-box;
        color: var(--theme-color, #42b983);
        display: inline-block;
        font-size: 1.05rem;
        letter-spacing: 0.1rem;
        margin: 0.5rem 1rem;
        padding: 0.75em 2rem;
        text-decoration: none;
        transition: all 0.15s ease;
    }
    
    section.cover .cover-main>p:last-child a:last-child {
        background-color: var(--theme-color, #42b983);
        color: #fff;
    }
    
    section.cover .cover-main>p:last-child a:last-child:hover {
        color: inherit;
        opacity: 0.8;
    }
    
    section.cover .cover-main>p:last-child a:hover {
        color: inherit;
    }
    
    section.cover blockquote>p>a {
        border-bottom: 2px solid var(--theme-color, #42b983);
        transition: color 0.3s;
    }
    
    section.cover blockquote>p>a:hover {
        color: var(--theme-color, #42b983);
    }
    
    body {
        background-color: #fff;
    }
    /* sidebar */
    
    .sidebar {
        background-color: #fff;
        color: #364149;
    }
    
    .sidebar li {
        margin: 6px 0 6px 0;
    }
    
    .sidebar ul li a {
        color: #505d6b;
        font-size: 14px;
        font-weight: normal;
        overflow: hidden;
        text-decoration: none;
        text-overflow: ellipsis;
        white-space: nowrap;
    }
    
    .sidebar ul li a:hover {
        text-decoration: underline;
    }
    
    .sidebar ul li ul {
        padding: 0;
    }
    
    .sidebar ul li.active>a {
        border-right: 2px solid;
        color: var(--theme-color, #42b983);
        font-weight: 600;
    }
    
    .app-sub-sidebar li::before {
        content: '-';
        padding-right: 4px;
        float: left;
    }
    /* markdown content found on pages */
    
    .markdown-section h1,
    .markdown-section h2,
    .markdown-section h3,
    .markdown-section h4,
    .markdown-section strong {
        color: #2c3e50;
        font-weight: 600;
    }
    
    .markdown-section a {
        color: var(--theme-color, #42b983);
        font-weight: 600;
    }
    
    .markdown-section h1 {
        font-size: 2rem;
        margin: 0 0 1rem;
    }
    
    .markdown-section h2 {
        font-size: 1.75rem;
        margin: 45px 0 0.8rem;
    }
    
    .markdown-section h3 {
        font-size: 1.5rem;
        margin: 40px 0 0.6rem;
    }
    
    .markdown-section h4 {
        font-size: 1.25rem;
    }
    
    .markdown-section h5 {
        font-size: 1rem;
    }
    
    .markdown-section h6 {
        color: #777;
        font-size: 1rem;
    }
    
    .markdown-section figure,
    .markdown-section p {
        margin: 1.2em 0;
    }
    
    .markdown-section p,
    .markdown-section ul,
    .markdown-section ol {
        /* line-height: 1.6rem; */
        line-height: 1.8rem;
        word-spacing: 0.05rem;
    }
    
    .markdown-section ul,
    .markdown-section ol {
        padding-left: 1.5rem;
    }
    
    .markdown-section blockquote {
        /* border-left: 4px solid var(--theme-color, #42b983); */
        border-left: 4px solid var(--theme-color, #CCC);
        color: #858585;
        margin: 2em 0;
        padding-left: 20px;
    }
    
    .markdown-section blockquote p {
        /* font-weight: 600; */
        margin-left: 0;
    }
    
    .markdown-section iframe {
        margin: 1em 0;
    }
    
    .markdown-section em {
        color: #7f8c8d;
    }
    
    .markdown-section code,
    .markdown-section pre,
    .markdown-section output::after {
        font-family: Arial, Helvetica, Sans-Serif, 'Roboto Mono', Monaco, courier, monospace;
    }
    
    .markdown-section code,
    .markdown-section pre {
        background-color: #f8f8f8;
    }
    
    .markdown-section pre,
    .markdown-section output {
        margin: 1.2em 0;
        position: relative;
    }
    
    .markdown-section pre>code,
    .markdown-section output {
        border-radius: 2px;
        display: block;
    }
    
    .markdown-section pre>code,
    .markdown-section output::after {
        -moz-osx-font-smoothing: initial;
        -webkit-font-smoothing: initial;
    }
    
    .markdown-section code {
        border-radius: 2px;
        color: #e96900;
        margin: 0 2px;
        padding: 3px 5px;
        white-space: pre-wrap;
    }
    
    .markdown-section> :not(h1):not(h2):not(h3):not(h4):not(h5):not(h6) code {
        /* font-size: 0.8rem;*/
        font-size: 0.85rem;
    }
    
    .markdown-section pre {
        padding: 0 1.4rem;
        line-height: 1.5rem;
        overflow: auto;
        word-wrap: normal;
    }
    
    .markdown-section pre>code {
        color: #525252;
        font-size: 0.8rem;
        padding: 2.2em 5px;
        line-height: inherit;
        margin: 0 2px;
        max-width: inherit;
        overflow: inherit;
        white-space: inherit;
    }
    
    .markdown-section output {
        padding: 1.7rem 1.4rem;
        border: 1px dotted #ccc;
    }
    
    .markdown-section output> :first-child {
        margin-top: 0;
    }
    
    .markdown-section output> :last-child {
        margin-bottom: 0;
    }
    
    .markdown-section code::after,
    .markdown-section code::before,
    .markdown-section output::after,
    .markdown-section output::before {
        letter-spacing: 0.05rem;
    }
    
    .markdown-section pre::after,
    .markdown-section output::after {
        color: #ccc;
        font-size: 0.6rem;
        font-weight: 600;
        height: 15px;
        line-height: 15px;
        padding: 5px 10px 0;
        position: absolute;
        right: 0;
        text-align: right;
        top: 0;
    }
    
    .markdown-section pre::after,
    .markdown-section output::after {
        content: attr(data-lang);
    }
    /* code highlight */
    
    .token.comment,
    .token.prolog,
    .token.doctype,
    .token.cdata {
        color: #8e908c;
    }
    
    .token.namespace {
        opacity: 0.7;
    }
    
    .token.boolean,
    .token.number {
        color: #c76b29;
    }
    
    .token.punctuation {
        color: #525252;
    }
    
    .token.property {
        color: #c08b30;
    }
    
    .token.tag {
        color: #2973b7;
    }
    
    .token.string {
        color: var(--theme-color, #42b983);
    }
    
    .token.selector {
        color: #6679cc;
    }
    
    .token.attr-name {
        color: #2973b7;
    }
    
    .token.entity,
    .token.url,
    .language-css .token.string,
    .style .token.string {
        color: #22a2c9;
    }
    
    .token.attr-value,
    .token.control,
    .token.directive,
    .token.unit {
        color: var(--theme-color, #42b983);
    }
    
    .token.keyword,
    .token.function {
        color: #e96900;
    }
    
    .token.statement,
    .token.regex,
    .token.atrule {
        color: #22a2c9;
    }
    
    .token.placeholder,
    .token.variable {
        color: #3d8fd1;
    }
    
    .token.deleted {
        text-decoration: line-through;
    }
    
    .token.inserted {
        border-bottom: 1px dotted #202746;
        text-decoration: none;
    }
    
    .token.italic {
        font-style: italic;
    }
    
    .token.important,
    .token.bold {
        font-weight: bold;
    }
    
    .token.important {
        color: #c94922;
    }
    
    .token.entity {
        cursor: help;
    }
    
    code .token {
        -moz-osx-font-smoothing: initial;
        -webkit-font-smoothing: initial;
        min-height: 1.5rem;
        position: relative;
        left: auto;
    }